Flexibility along the Neck of the Ostrich (Struthio camelus) and Consequences for the Reconstruction of Dinosaurs with Extreme Neck Length.
Dzemski, Gordon & Christian, Andreas. (2007). Flexibility along the neck of the ostrich (Struthio camelus) and consequences for the reconstruction of dinosaurs with extreme neck length. Journal of morphology. 268. 701-14. 10.1002/jmor.10542.